Question: After Miguel said "Watch what I do to Robby in the finals" why didn't Sam warn Robby and ask him not to fight Miguel and then go home?
Question: Johnny quit drinking in the last episode. Why did he go back to drinking in this one?
Answer: Because of the school fight at the end of season 2 - Robby injures Miguel.
The original question dealt with an episode of season 1. The school fight happened at the end of season 2, so it had nothing to do with why he went back to drinking in first season.
Answer: He quit being an alcoholic (temporarily), but Johnny probably wasn't planning on never drinking ever again, he just casually drank at the bar with Daniel.
Question: How did Shannon know that Robby was living with the Larussos?
Answer: Daniel said he called Shannon but she never picked up, when she came back from Mexico she probably saw Daniel called and figured out the situation.
Answer: Daniel told him.
Answer: She didn't want to interrupt the match.
I meant while Robby was in the other room with Daniel.
Miguel didn't imply he was gonna fight illegally to beat him and he never did, the only illegal thing he did was pull on his arm. I don't believe Sam got that implication from Miguel that he was going to use illegal moves to beat Robby.